Flue gas heat recovery device of diesel generating set

Abstract

The invention relates to a flue gas heat recovery device of a diesel generating set, and relates to the technical field of heat recovery devices. The heat recovery device comprises a heat recovery assembly, the heat recovery assembly comprises a plurality of separation boxes and a plurality of water pipes, the separation boxes sequentially abut against and are fixed, the water pipes correspond to the separation boxes one to one, the water pipes are inserted into the corresponding separation boxes, one ends of the water pipes are communicated with a header pipe, and the other ends of the water pipes extend out of the separation boxes; the adjacent separation boxes are communicated through the connecting holes, baffles are slidably connected to the separation boxes and used for blocking the connecting holes, and expansion blocks are arranged on the separation boxes and can drive the baffles to move. The heat recovery device has the effect of being high in heat recovery efficiency.

Description

Technical Field

[0001] The present application relates to the field of heat recovery devices, and in particular to a flue gas heat recovery device for a diesel generator set. Background Art

[0002] Diesel generator sets generate a large amount of high-temperature flue gas during operation. This flue gas is discharged into the atmosphere through exhaust shafts or exhaust pipes, which not only pollutes the environment but also wastes the energy in the high-temperature flue gas.

[0003] To reduce exhaust losses and lower exhaust temperatures, a flue gas heat recovery device is often used. A common method involves using a simple heat exchanger to directly exchange heat between the flue gas and the coolant. This method utilizes the principle of heat transfer, allowing the coolant to absorb heat from the flue gas.

[0004] However, the temperature of the hot water obtained by this method is fixed, and insufficient heat recovery is likely to occur, resulting in low heat recovery efficiency, so it needs to be improved. Summary of the Invention

[0005] In order to improve the problem of insufficient heat recovery, which leads to low heat recovery efficiency, the present application provides a flue gas heat recovery device for a diesel generator set.

[0006] The present application provides a diesel generator set flue gas heat recovery device that adopts the following technical solutions: A flue gas heat recovery device for a diesel generator set includes a heat recovery component, wherein the heat recovery component includes a plurality of partition boxes and a plurality of water pipes, wherein the plurality of partition boxes are fixed in sequence against each other, and the plurality of water pipes correspond to the partition boxes one by one, and the water pipes are inserted into the corresponding partition boxes, one end of the water pipes is connected to a main pipe, and the other end extends out of the partition box, and a connecting hole is provided on the side wall of the partition box, and adjacent partition boxes are connected through the connecting hole, and a baffle is slidably connected to the partition box, and the baffle is used to block the connecting hole, and an expansion block is provided on the partition box, and the expansion block can drive the baffle to move.

[0007] By adopting the above technical solution, the high-temperature flue gas generated by the diesel generator set is passed into a partition box at the very end. At this time, the high-temperature flue gas fills the entire partition box, thereby transferring heat to the water pipe in the partition box, thereby heating the water in the water pipe, so that hot water flows out of the water pipe for domestic water supply.

[0008] The heat in the partition box causes the expansion block to gradually expand, that is, the volume of the expansion block increases, thereby pushing the baffle to move until a gap appears between the baffle and the inner wall of the connecting hole, thereby opening the connecting hole. At this time, the hot air in the partition box enters the adjacent partition box through the connecting hole, thereby heating the next water pipe.

[0009] The hot air has already passed through the water pipes in the previous compartment, so its temperature is lowered. That is, the temperature of the hot air entering the adjacent compartment is lower than the original temperature. As a result, less heat can be transferred to the water pipes in the adjacent compartment, that is, after heating, the temperature in the water pipes is also lower.

[0010] When the heat in an adjacent compartment reaches a certain value, the expansion block expands, opening the connection hole to the next compartment, and so on, causing the water temperature in the water pipes to decrease in sequence. Therefore, different water temperatures can be selected according to different needs. The layout of multiple water pipes improves heat recovery efficiency through multiple heat exchanges, extracting the maximum thermal energy from the flue gas.

[0011] Optionally, a movable groove is provided on the partition box, the expansion block is provided in the movable groove, the expansion block can change its length in the vertical direction, a movable rod is fixed on the baffle, and the movable rod abuts against the top of the expansion block.

[0012] By adopting the above technical solution, in the initial state, the baffle moves downward due to gravity, completely blocking the connection holes, making the multiple compartments independent containers. When hot gas fills the compartments, the temperature inside the compartments rises until the high temperature causes the expansion block to expand, thereby increasing the vertical length of the expansion block, pushing the movable rod upward, which in turn drives the baffle to move, opening the connection holes and connecting the adjacent compartments, allowing the flow of hot gas and achieving multiple heat exchanges.

[0013] Optionally, a partition plate is provided in the partition box, the partition plate is sleeved on the water pipe, the peripheral side of the partition plate abuts against the inner wall of the partition box, a gap is left between the partition plate and the bottom of the partition box, and the connection hole is located at the top of the partition box.

[0014] By adopting the above technical solution, the partition plate blocks the air inlet end and the air outlet end of the partition box, dividing the space in a single partition box into two parts in the vertical direction, and these two parts are connected at the bottom of the partition box. When hot air enters the partition box from the top of the partition box, the hot air must first move in one of the parts of the space in the partition box until the part is filled with hot air.

[0015] At this point, the hot air reaches the very bottom of this section and flows from the bottom of the divider plate to the other part of the compartment. At this point, the hot air flows from bottom to top until it reaches the connection hole. The heated expansion block causes the baffle to move, allowing the hot air to enter the next compartment. For the next compartment, the hot air continues to fall from the top. The divider plate creates a U-shaped flow path for the hot air, creating a tortuous flow path for the flue gas within the compartment. This ensures that the hot air flows through the entire compartment, ensuring even heat transfer and fully utilizing the thermal energy in the flue gas, minimizing heat waste. This also increases the contact time between the flue gas and the water pipe, improving heat exchange efficiency.

[0016] Optionally, a rotating assembly is provided on the partition box, and the rotating assembly is connected to the partition plate and is used to drive the baffle to rotate with the water pipe as the axis.

[0017] By adopting the above technical solution, when it is necessary to obtain water with the same temperature in several water pipes, the rotating component is started to drive the partition plate to rotate so that the wall thickness of the partition plate is aligned with the connecting hole. At this time, the partition plate cannot block the opening, so that the air inlet end and the air outlet end of the partition box are directly connected. When the hot air enters one of the partition boxes, since the air inlet and air outlet of the partition box are both at the top of the partition box, the hot air that has just entered the partition box can quickly reach the connecting hole and reach the next partition box through the connecting hole. Similarly, the hot air can directly pass into the last partition box, so that the temperature difference of the hot air in several partition boxes is small, so that the temperature transferred to several water pipes is equal, and the water temperature of the water outlet of several water pipes is consistent, which is suitable for a variety of situations.

[0018] Optionally, the rotating assembly includes a rotating rack and several rotating gears, the rotating rack is slidably connected to the partition box, the several rotating gears correspond one-to-one to the partition plates, the rotating gears are coaxially fixed with the corresponding partition plates, the rotating gears are engaged with the rotating rack, and the rotating rack moves to drive the rotating gears to rotate.

[0019] By adopting the above technical solution, the rotating rack is driven to move on the partition box, and several rotating gears are driven to rotate simultaneously, so that several partition plates are turned in the corresponding partition boxes, achieving unified blocking or connection, and controlling the water temperature in several water pipes to decrease or be the same.

[0020] Optionally, a filter box is provided on one side of the partition box, one side of the filter box is connected to an air inlet pipe, and the other side is provided with an air outlet pipe connected to the partition box, a filter screen is provided in the filter box, the filter screen is provided on the top of the filter box, the filter screen is located between the air inlet pipe and the air outlet pipe, the middle part of the filter screen is recessed downward, the end point of the filter screen is located above the line connecting the air inlet pipe and the air outlet pipe, and the lowest point in the middle of the filter screen is located below the line connecting the air inlet pipe and the air outlet pipe.

[0021] By adopting the above technical solution, before the flue gas enters the partition box, it first enters the filter box through the air inlet pipe, and the flue gas flows to the air outlet pipe, thereby passing through the filter screen. The filter screen plays a filtering role, blocking impurities in the flue gas on the outer wall of the filter screen. Because the filter screen is concave, the flue gas passes through the outer wall of the filter screen and enters the arc-shaped interior formed by the filter screen, and then reaches the other side of the filter screen. When passing through the filter screen, the impurities are left on the inner wall of the filter screen, so that the flue gas is filtered twice, and a filter screen plays the role of multi-layer filtration, thereby improving the filtration accuracy, so that the flue gas entering the partition box contains fewer impurities, and is not easy to pollute the partition box and affect heat transfer.

[0022] Optionally, the filter box is provided with a flip motor, a flip frame is coaxially fixed to the output shaft of the flip motor, the peripheral side of the filter is connected to the flip frame, and the flip motor drives the flip frame to turn the filter.

[0023] By adopting the above technical solution, when a lot of impurities remain on the filter net, the flip motor is started to drive the flip frame to flip, thereby causing the filter net to turn upside down, so that the filter net tends to bulge upward. At this time, the filter net is pressed again, causing the filter net to sink downward again, so that the side of the filter net originally facing outward becomes facing inward, realizing the flipping of the filter net, that is, impurities can be left on the other side of the filter net, achieving the filtering effect.

[0024] During the flipping process of the filter, that is, the deformation process of the filter from arched to flat and then arched again, the pore size of the filter itself is also changing, so that impurities stuck in the pores can fall out, thereby cleaning the filter and allowing the smoke to pass through.

[0025] Optionally, a spring is connected to the filter, one end of the spring is connected to the flip frame, and the other end is connected to the center of the filter, a ball is fixed in the middle of the filter, and the end of the spring is fixed to the ball.

[0026] By adopting the above technical solution, when the flip frame drives the filter to flip, the action of the spring causes the filter to always convex, and the top wall of the filter box limits the height of the filter, thereby exerting downward pressure on the filter, causing the spring to be compressed. When the ball reaches the top of the filter box, the pressure on the filter reaches its peak, and due to the height difference between the ball and the filter, the filter becomes horizontal and then continues to concave. At this time, after the spring is compressed to the extreme, the end of the spring deflects downward, causing the spring to cross the balance point and reach the other side, causing the spring to recover its deformation and drive the ball downward until the filter becomes concave again, realizing that the filter automatically concave after turning over. When the spring drives the filter to concave, the elastic force will produce a slight vibration, thereby shaking off the impurities on the filter, thereby cleaning the impurities on the filter. Optionally, a plurality of brush plates are connected to the inner top wall of the filter box through a torsion spring, and the torsion spring is used to press the brush plate against the inner top wall of the filter box. A plurality of push rods are provided on the top of the filter box, and a pressure plate is fixed to the push rods. The plurality of push rods correspond to the brush plates one by one, and the push rods are in contact with the corresponding brush plates. The push rods move to drive the brush plates to flip downward.

[0027] By adopting the above technical solution, when the filter screen is flipped, the pressure plate is driven to move downward, so that the push rod pushes the brush plate downward, causing the brush plate to move downward. At this time, the torsion spring is deformed, and the brush plate moves downward until the brush on the brush plate can be aligned with the filter screen, so that the brush can slide relatively on the filter screen, thereby cleaning the filter screen and completing the cleaning of the filter screen.

[0028] Optionally, the bottom of the filter box is open, and a bottom plate is slidably connected to the bottom of the filter box, and the bottom plate is used to block the bottom opening of the filter box.

[0029] By adopting the above technical solution, impurities cleaned from the filter net will fall onto the bottom plate, and the bottom plate can be pulled out of the filter box by pulling it to clean the impurities in the filter box.

[0030] In summary, this application has at least one of the following beneficial effects: 1. The hot air is transferred through the water pipe in the previous compartment. This lowers the temperature, that is, the temperature of the hot air entering the adjacent compartment is lower than the original temperature, so that less heat can be transferred to the water pipe in the adjacent compartment. That is, after heating, the temperature in the water pipe is also lower. When the heat in the adjacent compartment reaches a certain value, the expansion block expands, opening the connection hole connected to the next compartment, and so on, so that the water temperature of several water pipes decreases in sequence. Therefore, water of different temperatures can be selected according to different needs, and the layout of multiple water pipes can improve the efficiency of heat recovery through multiple heat exchanges, and extract as much heat energy as possible from the flue gas. 2. Before the flue gas enters the separation box, it first enters the filter box through the air inlet pipe, and then flows to the air outlet pipe, thereby passing through the filter screen. The filter screen plays a filtering role, blocking impurities in the flue gas on the outer wall of the filter screen. Because the filter screen is concave, the flue gas passes through the outer wall of the filter screen and enters the arc-shaped interior formed by the filter screen, and then reaches the other side of the filter screen. When passing through the filter screen, the impurities are left on the inner wall of the filter screen, so that the flue gas is filtered twice, and one filter screen plays the role of multi-layer filtration, thereby improving the filtration accuracy, so that the flue gas entering the separation box contains fewer impurities, and is not easy to pollute the separation box and affect heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a flue gas heat recovery device for a diesel generator set according to an embodiment of the present application; Figure 2 This is a cross-sectional view of the structure of the flue gas heat recovery device of the diesel generator set according to the embodiment of the present application; Figure 3 This is a cross-sectional view of the structure of the heat recovery component.

[0032] In the figure: 10, heat recovery component; 11, partition box; 111, connecting hole; 112, moving groove; 12, water pipe; 121, main pipe; 20, expansion block; 30, baffle; 31, moving rod; 40, partition plate; 50, rotating component; 51, rotating rack; 52, rotating gear; 60, filter box; 61, air inlet pipe; 62, air outlet pipe; 63, brush plate; 64, bottom plate; 70, flip motor; 71, flip frame; 80, filter screen; 81, ball bearing; 90, spring; 130, pressure plate; 131, push rod. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-3 This application is described in further detail.

[0034] The embodiment of the present application discloses a flue gas heat recovery device for a diesel generator set. Figure 1 and Figure 2 The flue gas heat recovery device of the diesel generator set includes a filter box 60 and a heat recovery component 10. The filter box 60 is connected to an air inlet pipe 61 and an air outlet pipe 62. The air inlet pipe 61 and the air outlet pipe 62 are arranged opposite to each other. The flue gas generated by the diesel engine set enters the filter box 60 through the air inlet pipe 61. A filter screen 80 is provided in the filter box 60. The filter screen 80 is blocked between the air inlet pipe 61 and the air outlet pipe 62, thereby filtering the flue gas and realizing pre-treatment of the flue gas. The filtered flue gas enters the heat recovery component 10 through the air outlet pipe 62.

[0035] Reference Figure 1 and Figure 2Specifically, the heat recovery assembly 10 includes several compartments 11 and several water pipes 12. The compartments 11 are vertically positioned cylindrical and are fixed against each other in sequence. The compartments 11 are connected in series to form a single unit. The water pipes 12 correspond to each compartment 11 and are inserted into the corresponding compartments 11. After the high-temperature flue gas enters the compartments 11, it transfers heat to the water pipes 12.

[0036] Reference Figure 2 and Figure 3 The water pipe 12 is usually a copper pipe. Copper has good thermal conductivity and is conducive to heat transfer. One end of the water pipe 12 is connected to a main pipe 121, which serves to collect and distribute water flow. The other end of the water pipe 12 extends out of the partition box 11, which is convenient for connecting with other components or discharging heated water. A connecting hole 111 is provided on the side wall of the partition box 11, and adjacent partition boxes 11 are connected through the connecting hole 111, so that smoke can flow between each partition box 11. A baffle 30 is slidably connected to the partition box 11, and the baffle 30 is used to block the connecting hole 111. A movable groove 112 is provided on the inner wall of the partition box 11, and an expansion block 20 is embedded in the movable groove 112. In the embodiment of the present application, the expansion block 20 is silicone rubber, and the expansion block 20 can change its length in the vertical direction. A movable rod 31 is fixed on the baffle 30, and the movable rod 31 abuts against the top of the expansion block 20. When the expansion block 20 expands due to heat, its length in the vertical direction increases, pushing the moving rod 31 to move upward, thereby driving the baffle 30 to move, thereby controlling the opening and closing of the connecting hole 111 .

[0037] Reference Figure 2 and Figure 3 The exhaust pipe 62 is connected to the top of one of the partition boxes 11, so that the high-temperature flue gas enters the partition box 11 at the end. At this time, the high-temperature flue gas fills the entire partition box 11, thereby transferring heat to the water pipe 12 in the partition box 11, thereby heating the water in the water pipe 12, so that hot water flows out of the water pipe 12 for domestic water supply.

[0038] The heat in the partition box 11 causes the expansion block 20 to gradually expand, that is, the volume of the expansion block 20 increases, thereby pushing the baffle 30 to move until a gap appears between the baffle 30 and the inner wall of the connecting hole 111, thereby opening the connecting hole 111. At this time, the hot air in the partition box 11 enters the adjacent partition box 11 through the connecting hole 111, thereby heating the next water pipe 12.

[0039] Reference Figure 2 and Figure 3, because the hot air has passed through the water pipe 12 in the previous compartment 11, the temperature is reduced, that is, the temperature of the hot air entering the adjacent compartment 11 is lower than the original temperature, so that less heat can be transferred to the water pipe 12 in the adjacent compartment 11, that is, after heating, the temperature in the water pipe 12 is also lower.

[0040] When the heat in an adjacent compartment 11 reaches a certain value, the expansion block 20 expands, opening the connection hole 111 to the next compartment 11. This process continues in this order, causing the water temperature in each of the water pipes 12 to decrease in sequence. Therefore, water of different temperatures can be selected based on different needs. The layout of multiple water pipes 12 improves heat recovery efficiency through multiple heat exchanges, maximizing the thermal energy extracted from the flue gas.

[0041] Reference Figure 2 and Figure 3 A partition plate 40 is provided in the partition box 11, and a sleeve is coaxially fixed on the partition plate 40. The sleeve is sleeved on the water pipe 12 and can rotate on the water pipe 12. The top wall of the partition plate 40 is in contact with the top wall of the partition box 11, and a gap is left between the bottom wall of the partition plate 40 and the bottom wall of the partition box 11. The connecting hole 111 is located at the top of the partition box 11.

[0042] Reference Figure 2 and Figure 3 The partition plate 40 blocks the air inlet end and the air outlet end of the partition box 11, dividing the space in the single partition box 11 into two parts in the vertical direction, and the two parts are connected at the bottom of the partition box 11. When hot air enters the partition box 11 from the top of the partition box 11, the hot air must first move in one part of the space in the partition box 11 until the part is filled with hot air.

[0043] At this point, the hot air reaches the very bottom of this section and flows from the bottom of the partition plate 40 to another part of the space within the partition box 11. At this point, the hot air flows from bottom to top until it reaches the connection hole 111. By heating the expansion block 20, the baffle 30 moves, allowing the hot air to enter the next partition box 11. For the next partition box 11, the hot air still falls from the top. Under the division of the partition plate 40, the hot air flow path is U-shaped, causing the flue gas to form a tortuous flow path within the partition box 11, ensuring that the hot air flows through the entire space of the partition box 11, ensuring uniform heat transfer, fully utilizing the thermal energy in the flue gas, and less likely to cause partial heat waste. At the same time, the contact time between the flue gas and the water pipe 12 is increased, thereby improving the heat exchange efficiency.

[0044] Reference Figure 1 and Figure 3The partition box 11 is provided with a rotating assembly 50, which is connected to the sleeve and is used to drive the baffle 30 to rotate about the water pipe 12. The rotating assembly 50 includes a rotating rack 51 and a plurality of rotating gears 52. The rotating rack 51 is slidably connected to the partition box 11. The rotating gears 52 correspond to the partition plates 40 one by one. The rotating gears 52 are coaxially fixed to the corresponding partition plates 40 and mesh with the rotating racks 51. When the rotating racks 51 move, they drive the rotating gears 52 to rotate, thereby rotating the partition plates 40.

[0045] Reference Figure 2 and Figure 3 When the wall thickness of the partition plate 40 is aligned with the connecting hole 111, the partition plate 40 cannot block the opening, so that the air inlet end and the air outlet end of the partition box 11 are directly connected. When the hot air enters one of the partition boxes 11, because the air inlet and air outlet of the partition box 11 are both at the top of the partition box 11, the hot air that has just entered the partition box 11 can quickly reach the connecting hole 111 and reach the next partition box 11 through the connecting hole 111. Similarly, the hot air can directly pass into the last partition box 11, so that the temperature difference of the hot air in several partition boxes 11 is small, so that the temperature transferred to several water pipes 12 is equal, and the water temperature of the water outlet of several water pipes 12 is consistent, which is suitable for a variety of situations.

[0046] Reference Figure 1 and Figure 2 For the flue gas pretreatment part, a flip motor 70 is installed on the side wall of the filter box 60. The output end of the flip motor 70 is coaxially fixed with a flip frame 71. The flip frame 71 is horizontally mounted in the filter box 60. The two ends of the filter screen 80 are fixed on the flip frame 71. The middle part of the filter screen 80 is concave downward, so that the filter screen 80 is distributed in the vertical direction at the height of the entire filter box 60.

[0047] Specifically, the end point of the filter screen 80 is located above the line connecting the air inlet pipe 61 and the air outlet pipe 62 , and the lowest point in the middle is located below the line connecting the air inlet pipe 61 and the air outlet pipe 62 .

[0048] Before the flue gas enters the partition box 11, it first enters the filter box 60 through the air inlet pipe 61, and the flue gas flows to the air outlet pipe 62, thereby passing through the filter 80. The filter 80 plays a filtering role, blocking impurities in the flue gas on the outer wall of the filter 80. Because the filter 80 is arranged in a concave shape, the flue gas passes through the outer wall of the filter 80 and enters the arc-shaped interior formed by the filter 80, and then reaches the other side of the filter 80. When passing through the filter 80, the impurities are left on the inner wall of the filter 80, so that the flue gas is filtered twice, and a filter 80 plays the role of multi-layer filtration, thereby improving the filtration accuracy, so that the flue gas entering the partition box 11 contains fewer impurities, and is not easy to pollute the partition box 11 and affect heat transfer.

[0049] Reference Figure 1 and Figure 2 After the filter 80 has been used for a period of time, the filter 80 can be turned over by the flip motor 70 to resume filtering. A spring 90 is connected to the filter 80, one end of which is connected to the flip frame 71 and the other end is connected to the center of the filter 80. A ball bearing 81 is fixed to the middle of the filter 80, and the end of the spring 90 is fixed to the ball bearing 81.

[0050] When the flip frame 71 drives the filter 80 to flip, the action of the spring 90 causes the filter 80 to always be raised, and the top wall of the filter box 60 limits the height of the filter 80, thereby applying downward pressure to the filter 80, causing the spring 90 to be compressed. When the ball 81 reaches the top of the filter box 60, the pressure on the filter 80 reaches its peak. Due to the height difference between the ball 81 and the filter 80, the filter 80 becomes horizontal and then continues to concave. At this time, after the spring 90 is compressed to the extreme, the end of the spring 90 deflects downward, causing the spring 90 to cross the balance point and reach the other side, causing the spring 90 to recover its deformation and drive the ball 81 downward until the filter 80 becomes concave again, achieving the automatic concave state of the filter 80 after turning over. When the spring 90 drives the filter 80 to be concave, the elastic force will produce a slight vibration, thereby shaking off the impurities on the filter 80, achieving the cleaning of the impurities on the filter 80. Reference Figure 1 and Figure 2 , a plurality of brush plates 63 are connected to the inner top wall of the filter box 60 through a torsion spring, and the torsion spring is used to press the brush plates 63 against the inner top wall of the filter box 60. A plurality of push rods 131 are provided on the top of the filter box 60, and a pressure plate 130 is fixed to the push rods 131. The push rods 131 correspond to the brush plates 63 one by one, and the push rods 131 abut against the corresponding brush plates 63. When the push rods 131 move, the brush plates 63 are driven to flip downward to clean the filter screen 80. The bottom of the filter box 60 is open, and the bottom of the filter box 60 is slidably connected to a bottom plate 64. The bottom plate 64 is used to block the bottom opening of the filter box 60 to facilitate cleaning of filtered impurities.

[0051] The implementation principle of the flue gas heat recovery device of a diesel generator set in the embodiment of the present application is as follows: the high-temperature heat generated by the diesel generator set is passed into a partition box 11 at the end. At this time, the high-temperature flue gas fills the entire partition box 11, thereby transferring heat to the water pipe 12 in the partition box 11, thereby heating the water in the water pipe 12, so that hot water flows out of the water pipe 12 for domestic use. The heat in the partition box 11 causes the expansion block 20 to gradually expand, that is, the volume of the expansion block 20 increases, thereby pushing the baffle 30 to move until a gap appears between the baffle 30 and the inner wall of the connecting hole 111, thereby realizing the opening of the connecting hole 111. At this time, the hot air in the partition box 11 enters the adjacent partition box 11 through the connecting hole 111, thereby heating the next water pipe 12.

[0052] Among them, because the hot air has passed through the water pipe 12 in the previous compartment box 11, the temperature is reduced, that is, the temperature of the hot air entering the adjacent compartment box 11 is lower than the original temperature, so that less heat can be transferred to the water pipe 12 in the adjacent compartment box 11, that is, after heating, the temperature in the water pipe 12 is also lower. When the heat in the adjacent compartment box 11 reaches a certain value, the expansion block 20 expands, opening the connection hole 111 connected to the next compartment box 11, and so on, so that the water temperature of the water pipes 12 decreases in sequence. Therefore, water of different temperatures can be selected according to different needs, and the layout of multiple water pipes 12 can improve the efficiency of heat recovery through multiple heat exchanges, and extract the heat energy in the flue gas as much as possible.

[0053] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A flue gas heat recovery device for a diesel generator set, characterized in that: The invention comprises a heat recovery component (10), wherein the heat recovery component (10) comprises a plurality of partition boxes (11) and a plurality of water pipes (12), wherein the plurality of partition boxes (11) are fixed against each other in sequence, and the plurality of water pipes (12) correspond to the partition boxes (11) one by one, and the water pipes (12) are inserted into the corresponding partition boxes (11), and one end of the water pipes (12) is connected to the main pipe (121), and the other end extends out of the partition box (11), and a connecting hole (111) is provided on the side wall of the partition box (11), and adjacent partition boxes (11) are connected through the connecting hole (111), and a baffle (30) is slidably connected to the partition box (11), and the baffle (30) is used to block the connecting hole (111), and an expansion block (20) is provided on the partition box (11), and the expansion block (20) can drive the baffle (30) to move.

2. The diesel generator set flue gas heat recovery device according to claim 1, characterized in that: The partition box (11) is provided with a movable groove (112), the expansion block (20) is arranged in the movable groove (112), the expansion block (20) can change its length in the vertical direction, and a movable rod (31) is fixed on the baffle (30), and the movable rod (31) abuts against the top of the expansion block (20).

3. The diesel generator set flue gas heat recovery device according to claim 1, characterized in that: The partition box (11) is provided with a partition plate (40), which is sleeved on the water pipe (12). The peripheral side of the partition plate (40) abuts against the inner wall of the partition box (11), and a gap is left between the partition plate (40) and the bottom of the partition box (11). The connecting hole (111) is located at the top of the partition box (11).

4. The diesel generator set flue gas heat recovery device according to claim 3, characterized in that: The partition box (11) is provided with a rotating assembly (50), which is connected to the partition plate (40) and is used to drive the baffle (30) to rotate with the water pipe (12) as the axis.

5. The diesel generator set flue gas heat recovery device according to claim 4, characterized in that: The rotating assembly (50) includes a rotating rack (51) and a plurality of rotating gears (52). The rotating rack (51) is slidably connected to the partition box (11). The plurality of rotating gears (52) correspond to the partition plates (40) one by one. The rotating gears (52) are coaxially fixed with the corresponding partition plates (40). The rotating gears (52) are meshed with the rotating rack (51). The rotating rack (51) moves to drive the rotating gears (52) to rotate.

6. The diesel generator set flue gas heat recovery device according to claim 1, characterized in that: A filter box (60) is provided on one side of the partition box (11), one side of the filter box (60) is connected to an air inlet pipe (61), and the other side is provided with an air outlet pipe (62) connected to the partition box (11), a filter screen (80) is provided in the filter box (60), the filter screen (80) is provided on the top of the filter box (60), the filter screen (80) is located between the air inlet pipe (61) and the air outlet pipe (62), the middle part of the filter screen (80) is recessed downward, the end point of the filter screen (80) is located above the line connecting the air inlet pipe (61) and the air outlet pipe (62), and the lowest point of the middle part of the filter screen (80) is located below the line connecting the air inlet pipe (61) and the air outlet pipe (62).

7. The diesel generator set flue gas heat recovery device according to claim 6, characterized in that: The filter box (60) is provided with a turnover motor (70), a turnover frame (71) is coaxially fixed to the output shaft of the turnover motor (70), the peripheral side of the filter screen (80) is connected to the turnover frame (71), and the turnover motor (70) drives the turnover frame (71) to drive the filter screen (80) to turn over.

8. The diesel generator set flue gas heat recovery device according to claim 7, characterized in that: The filter (80) is connected to a spring (90), one end of the spring (90) is connected to the flip frame (71), and the other end is connected to the center of the filter (80). A ball (81) is fixed to the middle of the filter (80), and the end of the spring (90) is fixed to the ball (81).

9. The diesel generator set flue gas heat recovery device according to claim 6, characterized in that: A plurality of brush plates (63) are connected to the inner top wall of the filter box (60) via a torsion spring, and the torsion spring is used to press the brush plates (63) against the inner top wall of the filter box (60). A plurality of push rods (131) are provided on the top of the filter box (60), and the push rods (131) are fixed with a pressure plate (130). The plurality of push rods (131) correspond to the brush plates (63) one by one, and the push rods (131) abut against the corresponding brush plates (63). The push rods (131) move to drive the brush plates (63) to flip downward.

10. The diesel generator set flue gas heat recovery device according to claim 6, characterized in that: The bottom of the filter box (60) is open, and a bottom plate (64) is slidably connected to the bottom of the filter box (60), and the bottom plate (64) is used to block the bottom opening of the filter box (60).

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